Dual-lens camera system

Patent metadata

Field	Value
Publication number	US-9995945-B2
Application number	US-201715499387-A
Country	US
Kind code	B2
Filing date	Apr 27, 2017
Priority date	Apr 28, 2016
Publication date	Jun 12, 2018
Grant date	Jun 12, 2018

Abstract

A dual-lens camera system is provided, including a first lens driving module and a second lens driving module each including a lens holder for receiving a lens, at least one magnetic element, and a driving board. The driving board has at least one driving coil for acting with the magnetic element to generate an electromagnetic force to move the lens holder along a direction that is perpendicular to the optical axis of the lens. On two adjacent sides parallel to each other of the first and second lens driving modules, the magnetic elements are arranged in different configurations.

First claim

What is claimed is:

1. A dual-lens camera system, comprising:
a first lens driving module; and
a second lens driving module, the first and second lens driving modules being arranged in a long-axis direction and each comprising:
a lens holder configured to receive a lens;
at least one magnetic element; and
a driving board having at least one first driving coil, wherein the first driving coil is configured to act with the magnetic element to generate an electromagnetic force to move the lens holder along a direction that is perpendicular to an optical axis of the lens;

wherein on two adjacent sides parallel to each other of the first and second lens driving modules, the magnetic elements are arranged in different configurations, and
wherein the magnetic element of the first lens driving module has a strip or triangular structure.

2. The dual-lens camera system as claimed in claim 1 , wherein on the two adjacent sides parallel to each other of the first and second lens driving modules, the magnetic elements are arranged asymmetrically with respect to a central line between the two adjacent sides.

3. The dual-lens camera system as claimed in claim 1 , wherein on the two adjacent sides parallel to each other of the first and second lens driving modules, the magnetic elements do not overlap when viewed along the long axis direction.

4. The dual-lens camera system as claimed in claim 3 , wherein on the two adjacent sides parallel to each other of the first and second lens driving modules, the magnetic elements have the same length.

5. The dual-lens camera system as claimed in claim 3 , wherein on the two adjacent sides parallel to each other of the first and second lens driving modules, the number of the magnetic elements is the same.

6. The dual-lens camera system as claimed in claim 1 , wherein the magnetic elements comprise at least one multipole magnet.

7. The dual-lens camera system as claimed in claim 1 , wherein the magnetic pole direction of the magnetic element of the first lens driving module is parallel to the optical axis of the lens.

8. The dual-lens camera system as claimed in claim 1 , wherein the first and second lens driving modules each further comprise a frame, the lens holder being disposed in the frame which has the magnetic element mounted thereon, and the electromagnetic force generated between the first driving coil and the magnetic element drives the frame and the lens holder therein along the direction that is perpendicular to the optical axis of the lens.

9. The dual-lens camera system as claimed in claim 8 , wherein the first and second lens driving modules each further comprise a second driving coil disposed on the lens holder, and the second driving coil is configured to can act with the magnetic element to generate an electromagnetic force to move the lens holder along the optical axis with respect to the frame.

10. A dual-lens camera system, comprising:
a first lens driving module; and
a second lens driving module, the first and second lens driving modules being arranged in a long-axis direction and each comprising:
a lens holder configured to receive a lens;
at least one magnetic element; and
a driving board having at least one first driving coil, wherein the first driving coil is configured to act with the magnetic element to generate an electromagnetic force to move the lens holder along a direction that is perpendicular to an optical axis of the lens,

wherein on two adjacent sides parallel to each other of the first and second lens driving modules, the magnetic elements are arranged in different configurations, and
wherein the first lens driving module further comprises four magnetic elements respectively disposed at four corners of the first lens driving module.

11. A dual-lens camera system, comprising:
a first lens driving module; and
a second lens driving module, the first and second lens driving modules being arranged in a long-axis direction and each comprising:
a lens holder configured to receive a lens;
at least one magnetic element; and
a driving board having at least one first driving coil, wherein the first driving coil is configured to act with the magnetic element to generate an electromagnetic force to move the lens holder along a direction that is perpendicular to an optical axis of the lens,

wherein on two adjacent sides parallel to each other of the first and second lens driving modules, the magnetic elements are arranged in different configurations, and
wherein the magnetic element is not disposed on a first side of the first lens driving module adjacent to the second lens driving module.

12. The dual-lens camera system as claimed in claim 11 , wherein the first lens driving module further comprises a magnet disposed on a second side opposite the first side, and the width of the magnet is greater than the width of the magnetic element of the first lens driving module.

13. The dual-lens camera system as claimed in claim 11 , wherein the first lens driving module further comprises a weight balancer disposed on the first side and corresponding to the magnet for maintaining the weight balance of the first lens driving module.

14. A dual-lens camera system, comprising:
a first lens driving module; and
a second lens driving module, the first and second lens driving modules being arranged in a long-axis direction and each comprising:
a lens holder configured to receive a lens;
at least one magnetic element; and
a driving board having at least one first driving coil, wherein the first driving coil is configured to act with the magnetic element to generate an electromagnetic force to move the lens holder along a direction that is perpendicular to an optical axis of the lens,

wherein on two adjacent sides parallel to each other of the first and second lens driving modules, the magnetic elements are arranged in different configurations, and
wherein the first lens driving module further comprises a magnet and a magnetic field sensing element, the magnet and the magnetic field sensing element being disposed on a first side of the first lens driving module adjacent to the second lens driving module, and the magnetic field sensing element learns the position offset amount of the magnet by detecting the magnetic field variation of the magnet, and the magnet and the magnetic field sensing element do not overlap when viewed along the optical axis.

15. The dual-lens camera system as claimed in claim 14 , wherein the first lens driving module further comprises two magnetic field sensing elements, the magnet and the magnetic field sensing elements being disposed on the first side, and the magnet is located between the magnetic field sensing elements.

16. A dual-lens camera system, comprising:
a first lens driving module;
a second lens driving module, the first and second lens driving modules being arranged in a long-axis direction and each comprising:
a lens holder configured to receive a lens;
at least one magnetic element; and
a driving board having at least one first driving coil, wherein the first driving coil is configured to act with the magnetic element to generate an electromagnetic force to move the lens holder along a direction that is perpendicular to an optical axis of the lens, wherein on two adjacent sides parallel to each other of the first and second lens driving modules, the magnetic elements are arranged in different configurations; and

a shielding member comprising a magnetic conductive material and covering at least one side of the magnetic element of the first lens driving module for reducing the magnetic int

Assignees

• Tdk Taiwan Corp

Inventors

• Hu Chao-Chang
• Song Bing-Ru

Classifications

• H04N23/687

  by shifting the lens or sensor position · CPC title

• H04N23/68

  for stable pick-up of the scene, e.g. compensating for camera body vibrations · CPC title

• G02B7/09

  adapted for automatic focusing or varying magnification · CPC title

• G02B7/04

  with mechanism for focusing or varying magnification · CPC title

• G03B37/00

  Panoramic or wide-screen photography; Photographing extended surfaces, e.g. for surveying; Photographing internal surfaces, e.g. of pipe · CPC title